77901930908 has 12 divisors (see below), whose sum is σ = 144347695632. Its totient is φ = 36659732160.

The previous prime is 77901930907. The next prime is 77901930917. The reversal of 77901930908 is 80903910977.

It is a self number, because there is not a number n which added to its sum of digits gives 77901930908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77901930901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572808248 + ... + 572808383.

It is an arithmetic number, because the mean of its divisors is an integer number (12028974636).

Almost surely, 2^77901930908 is an apocalyptic number.

It is an amenable number.

77901930908 is a deficient number, since it is larger than the sum of its proper divisors (66445764724).

77901930908 is a wasteful number, since it uses less digits than its factorization.

77901930908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145616652 (or 1145616650 counting only the distinct ones).

The product of its (nonzero) digits is 857304, while the sum is 53.

The spelling of 77901930908 in words is "seventy-seven billion, nine hundred one million, nine hundred thirty thousand, nine hundred eight".